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The MPQ2459 is a monolithic, step-down, switch-mode converter with a built-in power
MOSFET. It achieves a 0.5A peak output current over a wide input-supply range with
excellent load and line regulation. Current mode operation provides a fast transient response
and eases loop stabilization. Fault protections include cycle-by-cycle current limiting and thermal
shutdown. The MPQ2459 requires a minimal number of readily-available, standard, external components. The MPQ2459 is available in a TSOT23-6 package.
- 0.5A Peak Output Current
- 1Ω Internal Power MOSFET
- Stable with Low-ESR Ceramic Output Capacitors
- Up to 90% Efficiency
- 0.1μA Shutdown Mode
- Fixed 480kHz Frequency
- Thermal Shutdown
- Cycle-by-Cycle Over-Current Protection
- Wide 4.5V-to-55V Input Operating Range
- Output Adjustable from 0.81V to 0.95×VIN
- Available in a TSOT23-6 Package
- fsw (max) (kHz)480
- Vin (min) (V)4.5
- Vin (max) (V)55
- Iout (max) (A)0.5
- Isw Limit (typ) (A)1.25
- Max Duty Cycle (%)0.935
- Vfb (typ) (V)0.812
- Iq (typ) (mA)0.73
- Regulated Outputs1
- Vout (max) (V)52
- Vout (min) (V)0.81
0.5A, 480kHz, 55V Step-Down Converter Evaluation Board
The EVQ2459-J-00A is an evaluation board for the MPQ2459, a fixed 480kHz frequency step-down switching regulator with an integrated high-side high voltage power MOSFET.
The board can provide the load current up to 0.6A. High power conversion efficiency over a wide load range is achieved by scaling down the switching frequency at light load condition. The 5V to 55V input range accommodates a variety of step-down applications.
The board provides compact arrangement of components. By switching at 480kHz, smaller value inductor and input/output capacitor can be used to lower down cost and save board space.
$50.00 + tax